5.1 This test method is not recommended for the acceptance testing of commercial shipments of wool top, card sliver, or scoured wool since the referee method, Test Method D2130, is recommended for that purpose. Although this test method is not recommended for acceptance testing, it is useful for fast quality control checks.5.1.1 If there are differences of practical significance between reported test results for two laboratories (or more), comparative test should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, use the samples for such a comparative test that are as homogenous as possible, drawn from the same lot of material as the samples that resulted in disparate results during initial testing and randomly assigned in equal numbers to each laboratory. The test results from the laboratories involved should be compared using a statistical test for unpaired data, a probability level chosen prior to the testing series. If bias is found, either its cause must be found and corrected, or future test results for that material must be adjusted in consideration of the known bias.5.2 The specific area of the wool fibers is measured by the resistance in air flow. The resistance to air flow has been related to average fiber diameter measured by the microprojection method. The instruments have been calibrated to read average diameter in micrometres. Although the reading is affected by the average fiber diameter distribution of the specimen, the results secured by the instruments give no indication of this distribution. However, in converting the micrometres reading to millitex units (Annex A1), low, medium, and high standard deviations were used in the calculations to arrive at the range of millitex units which accordingly reflect the distribution of fiber diameters.1.1 This test method covers the estimation of the average fiber diameter of wool fibers by use of the Port-Ar and the WIRA Fiber Fineness Meter instrument, which operate on the air-flow principle. Other air-flow instruments have not been tested with this method. The method is directly applicable to non-medullated, carded wool and wool top.1.2 This test method is applicable to grease wool and scoured wool after the samples of such materials have been prepared as directed in Test Method D2130.NOTE 1: The use of the Micronaire instrument for measuring the fineness of cotton fibers is covered in Test Method D1448. The assignment of grade for wool and mohair is covered in Specifications D3991 and D3992.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 590元 / 折扣价： 502 元 加购物车

4.1 As a skimming device is not typically deemed contraband in of itself, it is the responsibility of the examiner to determine if the device contains unauthorized account information. The purpose of this practice is to describe best practices for seizing, acquiring, and analyzing the data contained within magnetic card readers.4.2 Limitations—Skimmers present unique examination challenges due to:4.2.1 Rapid changes in technology;4.2.2 Difficulty of device disassembly;4.2.3 Use of alternate/repurposed components;4.2.4 Use of encryption or examination countermeasures, or both;4.2.5 Multiple data encoding/modulation formats;4.2.6 Prevention of chip identification by obfuscation of the device;4.2.7 Availability of training and documentation;4.2.8 Lack of chip information/documentation;4.2.9 Lack of adapters available for chip reading;4.2.10 Expense of available equipment used in chip removal and reading;4.2.11 Lack of software’s ability to support reading chip data; and4.2.12 Lack of commercial software available to analyze encrypted data extracted from skimmers.1.1 Magnetic card readers, when used for illegal purposes, are commonly referred to as skimmers. This practice provides information on seizing, acquiring, and analyzing skimming devices capable of acquiring and storing personally identifiable information (PII) in an unauthorized manner.1.2 This standard cannot replace knowledge, skills, or abilities acquired through education, training, and experience and is to be used in conjunction with professional judgment by individuals with such discipline-specific knowledge, skills, and abilities.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

定价： 646元 / 折扣价： 550 元 加购物车

This part of ISO/IEC 11694 specifies the use of biometric data on optical memory cards using the logical data structure defined in ISO/IEC 11694-5.

定价： 455元 / 折扣价： 387 元

5.1 This test method is not recommended for acceptance testing due to its poor between-laboratory precision. In some cases the purchaser and the seller may have to test a commercial shipment of one or more specific materials by the best available method even though the method has not been recommended for acceptance testing of commercial shipments. In such a case, if there is a disagreement arising from differences in values reported by the purchaser and the seller when using this method for acceptance testing, the statistical bias, if any, between the laboratory of the purchaser and the laboratory of the seller should be determined with each comparison being based on testing specimens randomly drawn from one sample of material of the type being tested.5.2 A knowledge of the average length and length distribution of fibers is important to fiber processors. This method is useful for inplant control testing and for research purposes.1.1 This test method covers the estimation of the average fiber length and length distribution of wool in nonparallel assemblies, such as scoured wool, and in card sliver.1.2 This test method is applicable to many fibers other than wool if in the form of a nonparallel assembly or in a card sliver.1.3 This test method is not applicable to unscoured wool or to wool top.1.4 This test method specifically requires length in inches and mass in metric units, and is not contrary to ASTM policy. The values stated in inch-pound units are to be regarded as the standard. The information in parentheses is for information only.Note 1—The determination of staple length of grease wool is covered in Method D1234, Sampling and Testing Staple Length of Grease Wool,2 and the average length of fibers in wool top is covered in Test Method D519.1.5 This standard does not purport to address the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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